<!DOCTYPE>
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta charset="utf-8">
  <title> Video Html5 </title>
  <meta name="generator" content="editplus" />
  <meta name="author" content="" />
  <meta name="keywords" content="" />
  <meta name="description" content="" />
 </head>

 <body>

<div style="text-align:center;">
  <button onclick="playPause()">播放/暂停</button> 
  <button onclick="makeBig()">大</button>
  <button onclick="makeNormal()">中</button>
  <button onclick="makeSmall()">小</button>

   <button onclick="makeVideo()">音量 0.5 </button>
  <br /> 
  <video id="video1" width="420" style="margin-top:15px;">
	<source src="mov_bbb.mp4" type="video/mp4" />
    <source src="mov_bbb.ogg" type="video/ogg" />
    Your browser does not support HTML5 video.
  </video>
</div> 

<script type="text/javascript">
var myVideo=document.getElementById("video1");

myVideo.controls = true;

function playPause()
{ 
if (myVideo.paused) 
  myVideo.play(); 
else 
  myVideo.pause(); 
} 

function makeBig()
{ 
myVideo.width=560; 
} 

function makeSmall()
{ 
myVideo.width=320; 
} 

function makeNormal()
{ 
myVideo.width=420; 
} 

function makeVideo(){
	myVideo.volume = 0.5
}
</script> 



 </body>
</html>
